Dear Zotero Support Team,

I previously successfully upgraded from Zotero 6 to Zotero 7 using the update check from the help menu and have already installed many plgins. Then, I received a prompt to switch from the 32-bit version to the 64-bit version. However, after the switching, I am now unable to launch Zotero 7 any more and encounter the following error message:

Error: Localized string not available for general.warning
Zotero.Intl</this.getString@chrome://zotero/content/xpcom/intl.js:167:15
this.getString@chrome://zotero/content/xpcom/zotero.js:1502:24
Zotero.DataDirectory.checkForUnsafeLocation<@chrome://zotero/content/xpcom/dataDirectory.js:631:14
From previous event:
this.init@chrome://zotero/content/xpcom/zotero.js:386:32
getContentsFromURL@chrome://zotero/content/xpcom/file.js:335:13
Zotero.Intl</<@chrome://zotero/content/xpcom/intl.js:99:35
Zotero.Intl</this.getString@chrome://zotero/content/xpcom/intl.js:138:13
this.getString@chrome://zotero/content/xpcom/zotero.js:1502:24
ZoteroPane<@chrome://zotero/content/zoteroPane.js:3129:19
@chrome://zotero/content/zoteroPane.js:31:18
@chrome://zotero/content/zoteroPane.xhtml:80:25

I downloaded the Zotero 6 again and the file storage is safe, but I have no idea how to upgrade it to Zotero 7 now. Once I upgrade it, the Zotero cannot be launched any more with the above error message.

I kindly ask for help to solve the problem because I really need some plugins which are only available for Zotero 7. Many thanks for the assistance!